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Message-ID: <499E06F1.8060200@gmail.com>
Date: Fri, 20 Feb 2009 09:27:13 +0800
From: YixunZhou <seanny2003@gmail.com>
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To: dev@harmony.apache.org
Subject: Re: How to use gdb to debug interpreter?
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Thank you, I'll try it~
> Hi YiXun
>  I think gdb scripts may help you for this problem
>  you can define a macro in .gdbinit file like this:
>
> define hsbreak main
> run -Xem:interpreter $arg0
> break hysl_open_shared_library
> continue
> finish
> disable
> break jni.cpp:CallStaticVoidMethod
> continue
> break interpreter.cpp:Opcode_NEW  #functions whatever you like
> continue
> dis
> end
>
> then, you can use this macro "hs" in your gdb command to set the breakpoint
> and debug.
>
> Thanks
> Simon
>
> 2009/2/19 YixunZhou <seanny2003@gmail.com>
>
>   
>> Hi all,
>>
>>   I modified harmony to make it support ClassRedefine, but I got a
>> segmentation fault when called new to create an instance of
>> the new version class. I changed to interpreter mode, and found the problem
>> happened when executing OPCODE_INVOKESPECIAL.
>>
>> case OPCODE_INVOKESPECIAL:
>>                              // Next line marks the
>> "P_TLS_vmthread->thread_exception" that an exception happened.
>>                               Opcode_INVOKESPECIAL(frame);
>>                               // get_current_thread_exception  can not
>> handle the exception properly and cause the segment fault.
>>                               frame.exc = get_current_thread_exception();
>>
>> I was using "printf" to locate the bug, but it is too complicated here. But
>> when I use gdb to trace the execution, it cannot follow the function
>> pointer "(*env)->CallStaticVoidMethod (env, cls, mid, args);" in main.c.
>>
>> So, how can I use gdb to debug the interpreter? Thanks.
>>
>>
>> --
>>
>> Best regard,
>> Yixun Zhou
>> seanny2003@gmail.com
>>
>>
>>
>>     
>
>
>   


-- 

Best regard,
Yixun Zhou
seanny2003@gmail.com